Measuring and gaging tool.



No. 878,439. PATENTED I'EB. 4, 1908-.

A. WAGNIBE-E. MEASURING AND GAGING TOOL.

APPLICATION FILED NOV. 19, 1906.

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be used AUGUST WAGNIERE, OF LOS ANGELES, CALIFORNIA.

MEASURING AND GAQING TOOL.

Specification of Letters Patent.

Patented Feb. 4, 1908.

Application filed November 19. 1906. Serial No. 344.158.

To all whom it may concern:

Be it known that I, AUGUST WAGNIERE, a citizen of the United States of America, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Measuring and Gaging Tool, of which the following is aspecification.

The main object of the present invention is to provide a sim 1e and accurate gage for determi the imensions of round or cylindrical odies, for example metal rods or wires.

A further object of the invention is to provide a gage of this character which can also be used as a de th gage.

- Another object of the invention is to provide a age of this character which can also as a thickness gage.

In the accompanying drawings :Figure 1 is a perspective of the tool. Flg. 2 is a section on lme m in Fig. 3. Fig. 3 is a section on line 9: in Fig. 2. Fig. 4 1s a perspective of the rear end of the tool inverted. Fig. 5 is a perspective of the rear end of the tool inverted; the scale member being reversed end for end.

The gage comprises a body 1 having arms, jaws or extensions 2 projecting in oblique, longitudinally diverging directions to form a contracted V shaped notch 3. Said body has also a groove or slot 4 extending longitudinally therein, the center of said groove being in line with the median line of the said notch. In this slot or groove fits and works a slide or scale member 5, graduated in an desired units. The said slide is held in t 1e slot or groove b means of a longitudinal face plate or shoul or member 6 formed on or attached to one side of the body 1 and extending over the slot or groove so that the'said shoulder member cooperates with the groove portion of the body to form a way in which the scale member is guided. The body 1 or shoulder member 6, 1s provided with an index line or mark 8 e06 erating with the marks or divisions of the scale member to indicate the longitudinal position of the scale member. Vernier marks 7 may also be provided. The inward ta er or convergence of the inner faces or e ges 9 of the arms 2 is such that when a round or cylindrical body is placed between such faces, the distance between the scale.

oint of intersection of the lines of such Ihces and the surface of such body will represent the diameter of such body. Expressed l geometrically, the perpendicular, distance from the point of intersection of these faces to any circle tangent to the faces is equal to the diameter to the circle. Means are provided for holdin the scale member frictionally in longitu inal position, such means comprising a leaf spring 12 extending in a' recess 13 in the bod 1 and pressin against one ed e of the scale member. cans are prefera ly provided for clam ing the scale member in an position, sai means com prising a mem er 14 in the form of a nut turning and screwing on a screw threaded pin or stud 16, said nut extending to the outside of the body member 1 through a transverse opening 18, in said bod member and being milled on its circumt e enable it to be rotated. The said nut acts as a pressure head engaging with the adjarence to cent face or edge of the scale member to press it against the opposite wall of the slot or groove 4 to bind the said scale member firmly in place.

Scale member 5 may be formed with marks of different dimensions on the two sides thereof and may be turned so as to bring one side or the other u perm0st for measurement. The said scale member may also be reversed end to end, one end thereof being adapted to be inserted into a hole or depression to serve as a depth gage, the back of the body 1 being beveled as at 20 to enable accurate reading on the back face of the The other end of the scale Ina be provided with an outer caliper arm or lead 21 extending laterally so as to enable measurement for thickness between such outer caliper arm and an inner caliper arm or head 22 on the rear end of the body 1.

The device is used as follows :Assuming that a cylindrical body, for example, that a finished steel rod, pin or shaft, indicated at 22, is to be measured, the scale member 5 is pushed forward toward the front 0 on end of the measuring arms or jaws 2 an the said cylindrical body is then placed against the front end of the scale member and pushed inwardly until it strikes the inwardly convergingedges or faces 9 of the jaws or arms 2. In this inward movement it will press the scale member 5 rearwardly, and when the body to be measured comes to rest against the inner faces of the arms 2, the outer end of said scale member will be at a distance from the mark or index 8 equal to the diameter of the said body, so that by reading the scale member with reference to said marks a direct reading is obtained of the diameter of the body. By selecting the proper angle for the divergence of the measuring jaws, the distance to which the scale is ushed back from the mark or index 8 may e made just equal to the diameter of the body to be measured, the gradu'ations on the scale being then of the actual length of the units in which the measurement is made, thus-enabling the ordinary scale graduations to be used, and practically the same graduations to be used in direct reading on the caliper. The proper angle for this purpose I have found to be 38, 56, 31.1. v

What I claim is a 1. A measuring and gaging tool comprising a body formed with arms-at its forward end havin their inner faces extending divergently from the body at an acute angle thereto 7 providing a contracted V shaped notch, and with an inner caliper head at the rear end of the body and a scale member having an outer caliper head and mounted on the bodyand adapted to slide longitudinally, thereof between the arms; the body and the scale member being graduated for gieasuring the movement of the scale mem- 2. A'measuring and gaging tool comprising a body formed with arms at its forward end havin their inner faces extending divergently rom the body at an angle thereto so t of intersection of said faces to any circle tangent to the faces is equal to the diameter of said circle and with an inner caliper head at the rear end of the body and a scale member having an outer caliper head and mounted on the body and adapted to slide longitudinally thereof between the arms; the body and the scale member being graduated for measuring the movement of the scale memher.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 9th day of November 1906.

AUGUST WAGN IERE.

In presence of- ARTHUR P. KNIGHT, FRANK L. A. GRAHAM.

rat the shortest distance from the point; 

